Mina works on teaching Mamoru how to use his built-in features. Takuma and Mamoru go out on the town, and Takuma learns quite a bit about his young companion, as well as about how society treats robots in general.
Ah, that's why it's playing 
as soon as I got home.
‫لهذا السبب يتم تشغيله
‫بمجرد عودتي إلى المنزل.
Aha. Darum läuft sie sofort,
wenn ich zurückkomme.
Ah... Por isso começou a tocar
assim que eu cheguei.